Status of glTF export feature

[GrigoAleex]

Hi,

I'm evaluating GLTFKit for a project that needs both import and export of glTF 2.0 assets (specifically, exporting textured meshes from an ARKit scan on iOS).

I noticed export is still in progress on feature/export. What is the current status there? Is there a specific subset of the spec that is already functional (e.g. geometry-only export), or is it blocked on something like texture/animation support?

If the remaining work is something a contributor can pick up, I'd be happy to help.

Thanks for the great work on this library.

[warrenm]

Round-tripping through GLTFAsset of static and textured meshes should already work on that branch, with the caveat that we don't preserve extras and (most) extensions, so it isn't robust for all use cases.

The main thing that's preventing the export work from being merged is that there is no path to export, say, SceneKit scenes or RealityKit scenes to GLTFAsset. What I'm trying to avoid is giving people the impression that this project is a general-purpose converter for those frameworks, which is not realistic. The RealityKit geometry and material APIs are so different from glTF's that achieving high-fidelity exports is staggeringly difficult. Plus, there are more robust and more efficient tools for 3D format conversion pipelines.

Having said that, I'm happy to work with you to get at least baseline export tidied up and ready to merge if you're willing to deal with the rough edges in the meantime. Knowing what's broken and what works for your use case will be motivation to get the export path into a more usable place.